home Aquarium What kind of water should be poured into the aquarium

What kind of water should be poured into the aquarium

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Rainwater has a similar composition to distilled water. Complete absence of beneficial bacteria and trace elements. This liquid is used only to reduce the level of hardness. Please note that rainwater can contain harmful acids. Therefore, it should be used only after testing and in small quantities.

How to prepare your aquarium water

In order for the fish to frolic and the plants to build up their vegetative mass, it is necessary to create conditions close to natural ones. To prepare a liquid suitable for the life of aquatic inhabitants means to remove heavy metals, mechanical impurities, phosphates, chlorine and nitrogen compounds from it. Any aquarist can do this at home. The following methods are used:

Preparing water for an aquarium is an important process that cannot be ignored when setting up a home pond.

What should be the water for an aquarium

Aquarium water is the basis for fish and plant life. If it does not meet the requirements, it contains harmful substances, it will not work to build a biobalance. This will cause the death of the inhabitants of the reservoir. Before starting aquarium fish, you should find out what kind of water you need to fill, how to properly prepare it.

What kind of water to pour into the aquarium

Water is available to humans from various sources. There are many options, so it’s important to know what suits the aquatic life. This is especially worrisome for aquarists who are equipping a reservoir for the first time. Before pouring water into the aquarium, you need to make sure that it is safe and beneficial for aquatic life.


The distilled liquid contains no salts or harmful compounds. It is completely purified. It cannot be taken entirely for the aquarium, but you can add it partially to the water supply.


Purchased bottled water does not contain chlorine. There is no need to defend it. But it is difficult to find a liquid with the required level of hardness. Good bottled water is an expensive option for fish. In aquaristics, cases have been described when mollusks died after pouring bottled water. This suggests that not all bottled water is of high quality.

On a note! If ordinary tap water is of very low quality, you have to choose between bottled or after a filter, the second option is better.


When water passes through the filter, it is considered “dead”. It does not contain beneficial microorganisms, but it also does not contain heavy metals, salts and other dangerous impurities. Before pouring water into the aquarium that has passed through the filter, it must be defended so that volatile chlorine compounds disappear.

Not all types of filters can be used. Water that has been passed through the filters below cannot be poured into the aquarium:

  • with antibacterial effect;
  • remineralizer;
  • saturating with silver ions.

Liquid that has been cleaned using such equipment can be detrimental to aquatic life. Such an aquatic environment will be radically different from the natural.

Periodic substitution

It is necessary to combine the tank cleaning procedure with a partial water change on a weekly basis. Make a bottom siphon and sanitary pruning of plants. Water is defended in advance. Experienced aquarists are advised to renew no more than 30% of the volume at a time. It is no longer recommended to avoid upsetting the established biobalance and stressing the fish.

Attention! The change is done more often, up to 3 times a week, if medications are added to the water due to fish disease.

Force majeure may also arise. For example, hazardous substances have entered the aquarium by accident, through oversight or ignorance. In such a situation, it is necessary to do not a substitution, but a complete replacement of the entire aquatic environment. The parameters of hardness, acidity and temperature should be close to the aquarium. The better the parameters are, the easier it will be for the fish to change the water.

Before pouring tap water, it is defended, if necessary, the hardness is reduced. To do this, add distilled or boiled. If the liquid in the tank is prepared using air conditioners, you can do the same when changing it.

What water to fill in an aquarium for fish: features and recommendations

Breeding aquarium fish is one of the most common hobbies around the world. It is not surprising, because the aquarium increases the humidity in the room, which is very important in modern large cities, and the fish allow you to calm down and relax after a hard day at work. But in order to avoid unpleasant consequences, every novice amateur should know what kind of water to pour into the aquarium.

Water for pregnant females and fry

Another important question that torments many newcomers: “What kind of water can be poured into an aquarium where pregnant females and young animals will live?” This is not as easy as it might seem. Ordinary water after sedimentation will not work. it does not contain habitual and vital microorganisms.

Therefore, the best solution is to use the water already available from the aquarium. Just fill a small spawning tank from the main one, and restore the loss of water by pouring in fresh water that has settled in buckets.

This will immediately create a “live” atmosphere in the aquarium. fish in it will be much more comfortable than in a fresh one.

Filling the aquarium for the first time

If you have just purchased an aquarium and have not yet put fish there, have not planted algae, but are just going to fill it for the first time, study this point especially carefully.

To begin with, the aquarium should simply be rinsed from the inside to get rid of dust and any possible contamination. You do not need to use detergents. a regular clean and damp sponge will do. After that, you can lay specially prepared soil. And after that. feel free to pour water directly from the tap. Then you need to leave it for a few days so that the chlorine evaporates. Fortunately, it evaporates quickly from water at room temperature.

Find the Height of Water Level When 6 L of Water is Poured in Aquarium

The water will most likely begin to “bloom” and become cloudy. Do not worry, this is quite natural. microorganisms that enter the aquarium multiply rapidly, but will soon die without a trace. Now you can plant algae and launch the first fish.

How much water to change at a time

Another important nuance. Some beginners think that cleaning the aquarium completely removes the water and refills it. This is a huge mistake. Several of these replacements will still survive, but they will often get sick. And then they can begin to die en masse. A complete water change is a huge stress. This should be remembered by every novice aquarist who wants his economy to please the eyes of friends and arouse envy among ill-wishers.

kind, water, poured, aquarium

In fact, no more than 20% of the water is removed during weekly cleaning. Using a hose with a metal nozzle, gently walk along the bottom of the aquarium. Experienced aquarists even set it up at an angle so that under-eaten food and fish waste accumulates in one corner. Draw in the water along with the debris (be careful not to accidentally suck in the gape of the fish), so that there is a bucket or two. You just need to pour it out or use it for watering flowers. microorganisms and trace elements contained in this water will only benefit green pets. Well, fill the aquarium with fresh water purified from chlorine by settling.

We take care of the Dutch type aquarium

Okay, with what kind of water needs to be poured into the aquarium fish, we figured it out. But what kind of water does algae need? The question is not at all funny, but very serious. The fact is that today Dutch-type aquariums are quite common. here the main inhabitants are algae, not fish. The latter either play a decorative function, or are absent altogether.

Plants need carbon dioxide, which they process during photosynthesis. If there are no fish, there is no gas. How to be? The problem is solved quite easily. Pour a couple of glasses of soda water into the aquarium once a week. Certainly not mineral and certainly not sweet. Plain water with bubbles. It contains a large amount of carbon dioxide, which will provide plants with a comfortable existence and rapid growth.

Simple sucks

Another question is what kind of water to pour into the aquarium when the fish already live there. After all, chlorine still poses a serious threat to the inhabitants.

In this case, regular settling will do. Take a suitable container with an enamel coating. its surface should be as large as possible so that the chlorine evaporates faster. Therefore, five-liter bottles will not work. the water will get rid of harmful substances for at least several weeks. Of course, a metal basin is ideal. But it takes up a lot of space, it is inconvenient to work with it, and such a container holds relatively little water. Because of this, experienced breeders use regular buckets.

Once you’ve got water, just leave the bucket in a place where it won’t get in the way of anyone. The ideal option is near the radiator so that the chlorine evaporates faster. In this case, cool it down to room temperature before pouring water into the aquarium.

Solving the stiffness problem

Often people, when wondering what kind of water should be poured into an aquarium, mean hardness. Indeed, this parameter seriously affects the fish, their health and lifespan. Too soft water leads to a deficiency of salts. fish grow slowly, females often die after giving birth. And increased calcium and magnesium salts often cause numerous diseases, and the percentage of successfully hatched eggs is sharply reduced. How to be in such a situation?

Fortunately, there is a solution. If the water flowing from the tap is too soft, dissolve a small amount of chalk, which is used in schools, in each bucket. It is a natural limestone that does not pose a hazard and maintains water hardness at the proper level.

You can also put some beautiful shells on the bottom of the aquarium. only real ones, not plastic or ceramic ones. Experienced aquarists do not lay them because of their beauty. the limestone from them is gradually washed out, increasing the rigidity. There are still special supplements on the market, but you cannot always find them. As you can see, the question of what kind of water should be poured into the aquarium, if it flows too hard from the tap, is quite easy to solve.

Increased stiffness is more difficult to deal with. You can boil it, but this is a rather complicated process, especially if the volume of the aquarium. not 50-60 liters, but several hundred. But if you plant hornwort, elodea and valissneria in your aquarium, then the problem will be partially solved. The fact is that these algae actively extract salts from the water, precipitating them on their leaves.

What kind of water should be poured into the aquarium

It’s no secret that each type of fish prefers its own water temperature. Barbs prefer warmer water, while goldfish prefer cooler water. The water temperature that is optimal for keeping fish determines the temperature of the water being poured. The same is the case with other parameters of the water poured into the aquarium.

If you keep cichlids that like hard water, you should not boil the water you fill in. Boiling softens the water, removing calcium and magnesium salts, on which water hardness depends.

Other fish prefer soft water, and the water can be boiled to soften it.

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As you know, water has an acidic or alkaline reaction, which is characterized by a pH level. I will not delve into chemistry, and I will note that the pH level of the filled water is taken into account. For example, spawning fish may refuse to lay eggs if the acidic or alkaline reaction of the water is inappropriate, which will confuse the uninformed aquarist when trying to breed.

Pour the water into the aquarium that is suitable for the fish in terms of their conditions.

Is it possible to fill the aquarium with bottled water

I do not recommend it. The concentrations of salts and minerals found in mineralized bottled water may not be suitable for aquarium fish, plants or invertebrates such as shrimp.

The composition of bottled water differs from manufacturer to manufacturer. This complicates the maintenance of the parameters of the poured water at the same level and requires constant use of water from one manufacturer.

Aquarists point to cases when, after pouring bottled water into the aquarium, plants stopped growing due to the lack of necessary salts and minerals in the water. Also, there was a massive death of shrimp the next day after pouring bottled water into the aquarium.

Is Tap Water Safe For Your Aquarium? | BigAlsPets.com

Consider bottled aquarium water as an alternative to tap water if the quality is poor. I believe that dirty tap water, purified with a charcoal filter and then boiled, is better for an aquarium than bottled.

Can boiled water be poured into the aquarium?

Yes. Boiled water is considered soft and pH neutral. Water softening acts as a stimulus for reproduction in many fish. For example, barbs and neons. Keep in mind that not all fish and aquarium plants love soft or softened water.

What kind of water to fill in an aquarium with fish and is it possible to fill in bottled and filtered water

It would seem that it is easier. Pour tap water, settle and pour into the aquarium.

Most novice aquarists do this, not for a second wondering if they are doing the right thing.

But, it is not enough to pour water into the aquarium. You need to know what kind of water can be poured into the aquarium and which one should not be poured.

When you think about it, how does the water differ in different aquariums? The water will differ in parameters like:

  • Temperatures
  • Hardness
  • pH level

A reasonable question arises, how to find out what parameters should be in the water poured into the aquarium? The answer is simple. It depends on the fish and plants that are in the aquarium or planned.

How much water to pour into the aquarium

The aquarium is poured completely, leaving 5-7 cm from the top edge. The indentation prevents the fish from jumping out of the aquarium, and leaves enough air above the surface of the aquarium, which is necessary for the labyrinthine fish to breathe in the aquarium covered with a lid.

Is it possible to fill the aquarium with filtered water

In some cases, it is acceptable. If the water is filtered through mechanical cleaning or a charcoal filter, then filling the aquarium is permissible. There is no need to fill the aquarium with water passed through the filters below:

  • Antibacterial filter
  • Remineralizing filter
  • Silver ion enrichment filter
  • Ion exchange filter Na or H

By the way, many manufacturers of bottled water use ion exchange filters. This filter replaces magnesium and calcium ions with sodium ions, less often with hydrogen ions. Fish and aquarium plants do not tolerate high sodium concentrations.

Remember! If fish already live in the aquarium and plants are planted, then the parameters of the aquarium water should not be drastically changed. Distinguish between refills, refills and water changes.

Features of tap water

In addition to regularly feeding the fish, the aquarium requires lighting, heating, soil cleaning, baying and water renewal. Simultaneously with the purchase of all the necessary accessories and the study of the operation of the aquarium equipment, it is necessary to deal with the preparation of the water. Once you learn how to do this, you can apply this skill in any other setting of the aquarium.

All professionals agree that tap water should be poured into the aquarium. This is true if the only unnecessary element in the water is chlorine. Its norm for humans is 0.3 mg / l, and for fish, the norm of 0.25 mg / l is already the limit. During the time from the flood of water to the planting of the first plants in the aquarium, the water has time to settle, and the chlorine evaporates. During the second week, the introduction of microorganisms into the water in the form of bacterial starter cultures will help create the necessary flora for the life of the fish.

If you are not sure about the quality of the water or want to be as accurate as possible in the calculations, you will have to find out the data on the composition of the water in the information department of the waterworks. In addition to the presence of unnecessary impurities that are not suitable for the selected type of fish, water can be disinfected:

  • Ozonation, which is already favorable in most cases.
  • Chlorine. Too chlorinated water should be additionally passed through a charcoal filter or dechlorinator.
  • Chloramin, which does not erode upon standing. In practice, its use is extremely rare, but it itself is capable of forming in water when chlorine is combined with ammonia.

What kind of water to pour into the aquarium

If you are a beginner aquarist, then you have to do a lot of preparatory work to start the aquarium. Even if you can’t wait to start admiring a beautiful working aquarium, remember that rush will only get in the way. The volume of the aquarium is too small to create an independent ecosystem in it, so be prepared for the fact that it will be up to you to maintain it.

Water preparation and renewal

Ignoring the renewal of water in the aquarium leads to its slow dying with a decrease in the number of its inhabitants. old fish get used to old water and become its hostages, and new fish cannot take root in such an environment. Regular renewal of 20-25% of the water in the aquarium should be carried out without fail. once a week. During this time, the water has time to evaporate noticeably, and the remaining water becomes clogged with waste. The exact amount of water replaced at a time must be adjusted to the whimsicality of the fish you breed.

Fresh water is defended for at least 3 days, bringing it closer by special purification to the properties of water in the aquarium so that the fish do not experience stress and do not get sick:

  • water from wells or wells is not suitable, as it may be too different in hardness;
  • water from a lake or river must be warmed up to 70 degrees to remove harmful microorganisms;
  • rainwater is applicable only to rural areas and requires cleaning through a filter;
  • the water to be poured should be at room temperature 22-25 degrees.

It is necessary to test water by three chemical indicators: pH, nitrite and ammonia. It is they who are able to form the correct bacteriological indicators of water. In softer water, a friendly ecosystem develops faster. Fresh water, which contains more oxygen, has a beneficial effect on the activity of fish and plant growth. Water is taken from a cold tap and settled in a container, preferably with a maximum area of ​​contact between water and air. for example, in a basin. To protect against dust ingress, the dishes are covered with gauze and placed in a warm place. The quality of water settling is determined by the smell. it should be fresh and pleasant.

Large replacement of old water, when it remains less than 20%, is rarely carried out. This is a necessary measure that should be taken when fungus appears, water blooms, unwanted microorganisms and severe soil contamination. They indicate serious damage to the aquarium ecosystem, which can only be restored by replacing it.

Types of water used in aquariums

Smoothly moving on to the types of water. So, two types of water are used in the aquarium hobby: “old” and fresh. Old water is used at home in amateur aquariums, because there are fewer problems with it. less often it is necessary to change (which is not unimportant, because in large aquariums the process can be quite long.), bacteria develop poorly and the fish are less sick. But there are also disadvantages: not only bacteria develop poorly, but also fish and plants, because the former can suffocate in their own “poop”, others do not have enough minerals.

And fresh water is used by professionals for breeding their pets, I will not talk in more detail, I myself keep fish only for amateur purposes and I don’t know all the accuracy, but the effect is approximately the opposite of the one described above.

Aquarium water

The most important component of the aquarium is water, the health and well-being of the aquarium inhabitants directly depends on its quality and condition. This is why it is very important to know how to prepare the water for your aquarium. In this article, FIRSTaqua.ru will tell you what kind of water you need for an aquarium.

If you have clean water flowing from the tap in your apartment or house (not rusty, without the smell of bleach), then you can safely use it for an aquarium. You need to take only cold water, since chlorine is present in hot water. Immediately pouring tap water into the aquarium is impossible, it must first be defended, so we take some container, fill it with water, put it in an apartment in a warm place and wait 1.5-2 days. During this time, harmful impurities should evaporate from the water and its temperature should reach room temperature (24-26 degrees). All your water is ready!

But before pouring it into the aquarium, check the water temperature again, it must be like in the aquarium, just check the temperature of the water in the aquarium and the one you want to fill by touch. If the new water for the aquarium is still colder, then it is advisable to warm it up. Here you can use the thermostat, set the desired temperature on it and put it in the water. This is if you change the water in the aquarium.

In general, if we talk about changing water, it is generally accepted that it is necessary to change 1 \ 4. 1 \ 5 of the total volume of water in the aquarium, 1 time per week. But the controversy about this does not subside. There are, of course, many different nuances (what plants, fish are presented in the aquarium). But since we are talking about an aquarium for beginners, then most likely you will have the most simple and unpretentious representatives of aquarium fish and plants in it, and maybe there will be no plants at all. Therefore, FIRSTaqua.ru recommends for you to change 1/5 of the water once a week.

If you are installing a new aquarium, then the water after it has settled can be safely poured into the aquarium, since it is still empty. And already in it, monitor the temperature of the water. Aquarium thermometers can help here. The most important thing is that you need to launch the fish into warm, settled water. Fish very poorly tolerate changes in water temperature, even by several degrees (they can die). Plants, of course, are more resistant, but it is also advisable to plant them in an aquarium with prepared water.

As for the containers in which the water will need to be defended, it is very convenient to use 5 liter bottles. You just need to remove the lid so that the water evaporates.

  • We use tap water for the aquarium
  • We defend it at home for 1-2 days.
  • We monitor the temperature of the water, it should be the same as in the aquarium (or 24-26 degrees).
  • And we change 1 \ 5 of the water once a week in the aquarium.
What water is needed for an aquarium

How often do you need to change the water in the aquarium?

This article focuses on the advantages and disadvantages of different sized aquariums, but for a better understanding, I will write a little about how often you need to change the water in the aquarium, what water to fill in the aquarium during a change, and how to properly change the water in the aquarium.

But first, let’s talk about water. Drinking water is, as everyone knows, of different hardness, namely: soft, medium hardness and hard. This gradation is due to the different amount of impurity content of different salts in this water. The softer our test liquid, the more readily and faster bacteria develop in it, the harder, the more difficult life is for our microscopic animals.

By the way, the aforementioned salts tend to partially precipitate with slight heating, and then we can contemplate them on the walls of our teapots after boiling water. fu, it tears off hard, isn’t it? That is why in advertisements all sorts of uncles poke their “latest developments” of water softeners into the TV screen and say that your washing machine, if you don’t buy yourself a bottle, will surely break, but that there. the whole world will turn into scale! Well, okay, if it’s serious, then of course it is necessary to use such substances, because indeed the water heating elements can burn out due to the deterioration of heat transfer from scale. But anti-scale additives were invented a very long time ago for internal combustion engines, boilers and all kinds of machines that need to be cooled with water.

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Even if I deviated from the topic. back. So, what are the main indicators of water that affect the growth of fish? And this is oxygen in water and all kinds of nasty things like heavy metals.

Oxygen is the most important component, if there is little of it, then the fish swim near the surface and gasp for air, and this not only gives them discomfort, but is also fraught with burns to the gills, unless your pets belong to the labyrinth family and can breathe atmospheric air. I will write about them in more detail later.

By the way, plants emit a lot of oxygen, this happens only with bright daylight from a window or with the help of a powerful light bulb, but the process of active oxygen evolution is not long and you cannot rely on plants alone. I will write in more detail a little later, in the article about aquarium plants.

Well, we have figured out the first point, now we can talk about the “nasty things”. I mean by this word the waste products of fish. They are toxic and cause a lot of problems, if oxygen starvation can be solved by installing a compressor, then things will be more difficult, you need to change the water to fresh, which is why for large, “pooping a lot” fish, huge aquariums are advised everywhere.

What kind of water to pour into the aquarium

Step by step start of the aquarium

Today I am going to tell you in detail how to properly start your first aquarium. so!

It only at first glance seems that starting an aquarium is one piece of cake: poured water, threw soil, snag, stuck a couple of bushes of plants, everything. you can start the fish. If you do this today, then tomorrow you will collect fish floating to the top with their belly: they will simply die! Preparing for launch is an extremely demanding business. We look at the step-by-step algorithm for starting an aquarium.

To begin with, you must carefully prepare the soil, driftwood and plants.

2) Ground. With the soil, everything is a little easier: if you use pebbles or gravel (the size is not important), then they must be boiled for an hour in slightly salted water. If you use sand, then the sand must be calcined in a frying pan: there is even more rubbish in the sand than in snags and pebbles (gravel) combined! The sand is poured in portions onto a hot skillet and “roasted” for 30 minutes. In this case, the sand must be often stirred with a wooden spatula or spoon. After calcining, I recommend sifting the sand through a fine sieve to remove all incidental impurities that are larger than a grain of sand (I always do this and advise you). After these procedures, the soil can be applied.

3) Plants. As for the plants, they should also be disinfected. But, of course, they do not need to be thermally processed. It is recommended to first rinse the purchased plants with a stream of running water. Then, pour some settled water into a bowl and add a couple of potassium permanganate crystals to it (the water will turn pale pink). Next, you remove the plants from the potassium permanganate solution and put them in a container, say, in a jar, with settled water. Leave the plants in the jar for a week: during this time, the plants will create their own microclimate and go through certain stages of adaptation. We leave them alone for now.

4) Aquarium. Everything is simple here: it should be thoroughly washed, but never use household chemicals for washing. If, God forbid, you rinse the container badly and even a drop of “chemistry” remains, then you will be in trouble! Wash the aquarium only with a stiff brush, new sponges, and you can use a little salt or soda as a detergent.

5) Mandatory equipment for the aquarium. This concept includes:

  • compressor, it is also an aerator (this device serves to enrich the aquarium water with oxygen);
  • an aquarium filter. a device that filters water, retaining all kinds of organic and mechanical suspensions, such as: dust particles, particles of rotting plants, etc.
  • thermometer. it is clear why;
  • fluorescent lamp. to illuminate the aquarium (the power and intensity of the lamp glow depends on the specific types of fish and plants that will live in the new house);
  • nets, scrapers, sponges. it is also clear why;
  • a cover for the aquarium must be mandatory, because no one canceled the threat from the outside.

Depending on the size and weight of the aquarium, you select the appropriate cabinet. You can choose the place arbitrarily, but keep in mind: the aquarium should not stand near a window or in the immediate vicinity of radiators. The best place for him is under the wall.

Now we move on to the stages of filling a new house for fish with soil, snags, plants, water and inhabitants.

Launching the aquarium. Stage one: stele the soil. The soil can be covered with an even layer, or you can create mountains and hillocks. it’s up to your taste. But keep in mind: the soil layer, in any case, should be at least 4-5 centimeters. This is necessary so that the soil is not heavily silted up. When backfilling, consider the tastes of your fish: some fish like sand, others only gravel or pebbles, and still others like sand and gravel in a mixed state. In general, this factor should be taken into account.

Launching the aquarium. Stage two: install driftwood and other accessories. Well, nothing complicated here: take a pencil, a piece of paper and sketch out the approximate location of the accessories. By the way, this is the most reasonable method and is used by experienced aquarists. Example: driftwood is placed a little further from the center of the aquarium, flat stones, fancy stones, shells, pottery shards, clay shards, coconut shells, bamboo, etc. are placed at the bottom in a chaotic or orderly manner.

Launching the aquarium. Stage three: fill in water. Attention: the water should be poured very carefully in order to avoid excessive turbidity. How to do it right? Take a bucket of water and a piece of regular garden hose. Now lower one end of the hose into the bucket and the other end into the aquarium, to the very bottom. Place the bucket above the level of the aquarium (take a stepladder and place the bucket on the topmost platform). Further. pure physics (the law of communicating vessels): take in your mouth the end of the hose that was lowered into the aquarium, make a suction effort. and the water will flow from the bucket into the aquarium. Now direct the stream of water towards the glass and you will avoid clouding. There is another way: when pouring water (without a hose and a bucket), put a plate on the bottom of the container and direct the flow of water into it: water from the plate will fill the container evenly and without splashes. When the aquarium is full, we leave it alone (we don’t populate any fish and other living creatures there. it’s too early).

Launching the aquarium. Stage four: we connect the filter and compressor. The size of the filter is directly proportional to the size of your aquarium: that is, large for large, small for small. Each filter has a power regulator. We put the regulator in the middle position. Next, we start the compressor and also in the middle mode. Attention: if the room is warm, then you do not need an aquarium heater. If it is cool, then it will be needed in order to establish a constant (more or less) water temperature. as a rule, the optimum temperature is 23C25C. Do not turn on the lighting. And I remind you again: do not plant any plants or fish!

In this state, the aquarium should stand for some time. We follow the changes that will occur during the launch of the aquarium:

1) Day one. fourth: it is likely that the water may become cloudy. Do not let this scare you: at this time a kind of microclimate is created and your intervention can disrupt the emerging ecology of the aquarium;

2) Plant the first plants in the aquarium on the fourth day. Plants should be the most undemanding to water parameters. These are: nayas, hornwort, vallisneria, riccia, hygrophila, ambulia.

3) On the ninth to tenth day, you can turn on the lighting. But only for a certain time, about 9-10 hours a day. At the same time, we take out and clean the filter: in ten days it clogs up and needs a thorough cleaning. (By the way. about cleaning the filter. When you clean and rinse it, take aquarium water (from your own aquarium) into a separate container and rinse it only in this water). Launch the first inhabitants into your new home: for example, a flock of swordsmen. Watch the fish for the first day, but do not feed them (do not be afraid. they will not die).

4) Day eleven: feed the fish. We give a little food, because yesterday your fish did not eat. And if they are given a lot of food, then they will have stomach problems. Feed them twice a day in small portions of bloodworms. Keep observing.

5) Day seventeen-twentieth: if everything is in order and your fish are cheerful and mobile, then the ecosystem is established, and you can continue settling. However, before that, you should change about 10-15% of water, clean the glass, clean the filter again. Depending on the size of the aquarium, you can continue to populate it, but keep in mind the following: overpopulation is the enemy not only of the fish themselves, but of the entire ecosystem in principle. Remember the unspoken rule: for 1 fish, up to 5 centimeters in size, you need 2-3 liters of water. Based on this, draw a conclusion about who and how much you can plant in the aquarium. Don’t forget snails, as the snail is a natural organic waste recycling laboratory.!

6) Day twenty-fifth: clean the soil, change the water. 15% of the volume.

This is, in fact, the whole launch of the aquarium: now it has acquired its own climate and is working!

Your further actions: 1) weekly water change, in the amount of 1/3 of the total water volume; 2) cleaning the filter. every five days; 3) once a week we clean the soil;

4) diversify the diet of your fish.

Frequency of water changes in the aquarium, what water to fill in the aquarium and how to properly change the water in the aquarium

How often do you need to change the water in the aquarium. the difference between the types of water is simply the different frequency of changes. In every aquarium, a balance is established between fish, plants and bacteria, which cannot be disturbed, otherwise there will be health problems for your beloved tailed beasts and therefore you can change no more and no more than 1/3 of the size of the aquarium in two days.

What kind of water to pour into the aquarium during a change and how to correctly make a change. they take good, settled water for this (for unpretentious species, you can, in principle, pour it right from the tap) I fill in and pour out water using a hose. Firstly, it is convenient, and secondly, you can also collect excess sludge in hard-to-reach places. The diameter of the hose is chosen according to the size of the aquarium, or more precisely, so that fresh water would not be poured in suddenly, but gradually, within at least ten minutes in order to avoid a rapid drop. In general, water can be poured out at any speed, as long as the fish do not pour out with it, but pour in: the slower, the better of course.

Well, here we come to the so-called “denouement of the article.” Large aquariums are good for almost everyone: you can plant a lot of fish, rarely change the water, do not worry that in anticipation a large fish will not grow to its true size, it is easier to arrange and, finally, it is simply more difficult to spoil the water by inept or untimely intervention. But there is also one very significant disadvantage. not everyone in the house will have a huge aquarium.!

With a small aquarium, the opposite is true, but do not be discouraged, there is also less water in it, you can change it quickly, which means you can do it more often. And with careful handling of its ecology, everything will be fine too!

Where to get water for the aquarium? What kind of casting?

After the first aquarium is purchased, the question arises: what kind of water can be poured into it so that its inhabitants feel comfortable? People who have never had an aquarium may think that the best option is a well, lake or river, but this is far from the case.

Experienced aquarists know that the water in these bodies of water is complex in composition. both chemical and bacteriological. To cleanse it of all harmful substances, you will have to understand its composition for a long time, clean it, and when you change the water, an analysis is carried out every time.

If you decide to fill the aquarium with well water, it means that you do not know that it has a low pH, therefore it is not suitable for the life of fish and plants in the aquarium. Thus, there is only one way out. to use running water.

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Where to get water for the aquarium? All aquarists use tap water. But, in order not to risk it, its composition can be clarified in the information department of the water supply station. There they will give information about pH, hardness, chlorine and nitrates. A high concentration of chlorine in water (more than 1 mg / l) can lead to the death of fish, and a dose of 0.25 mg / l is considered the limiting one. In unsettled running water, chlorine is not more than 0.3 mg / l.

However, to avoid problems, you must first clean it before pouring running water into the aquarium. In no case do not pour tap water into the aquarium without pretreatment in the spring, during the flood period. at this time, the amount of chlorine increases significantly.

If you need to quickly get rid of chlorine in water, use a dechlorinator, a chemical that, when it gets into the water, reacts with chlorine to form a low-toxicity substance. What kind of water to pour into the aquarium? Any aquarist will tell you that it should be running tap water, previously purified from chlorine.

If you do not want to use chemicals, then draw water from the tap into a container with a wide mouth. it is better if it is a basin or a small bath. Leave it to sit for a few days. For a new aquarium, water preparation should be started several weeks in advance. As soon as this time has passed, and the chlorine has disappeared, it is poured into the aquarium, after three days the plants are planted, and after a week the fish are launched.

Before pouring water into the aquarium, make sure that it does not contain harmful substances.!


It is important to understand where the water was taken from before freezing. If we are talking about natural melt water, then it can only be used if the aquarist lives somewhere in the Taiga, where the nearest industrial enterprise is hundreds of kilometers away.

Otherwise, almost the entire periodic table will be present in the melt water.

If this is tap water, then this makes sense only when freezing is done with the aim of slightly affecting the KN in a smaller direction. But this is not worth it, with large volumes of the aquarium, water treatment can turn into a real hell with cutting circles around the refrigerator.

kind, water, poured, aquarium

This procedure can be carried out several times, but this is a dreary process that takes a lot of time and effort. It is strictly forbidden to use melt water from ice that was collected on the street.

What should be the parameters of the water?

The main parameters that you should always pay attention to are acidity and hardness. If acidity can still be controlled by carbon dioxide, then it is more and more difficult with hardness.

It is worth judging whether water is suitable for certain purposes based on the results of the KH and GH test:

Aquarium type Allowable carbonate hardness (KH, ⁰) Permissible total hardness (GH, ⁰)
Cichlid with African cichlids 10-25 20-40
Herbalist 0-6 0-10
Aquarium with unpretentious fish 0-12 0-20
Seawater aquarium
Shrimp 0-2 4-6

In addition to these parameters, there are others, on which a lot also depends:

  • Nitrates (NO3). serve as food for plants and algae. At high concentrations, they have a toxic effect on fish (from 50 mg / l) and shrimp (from 20 mg / l).
  • Phosphates (PO4) are also a nutrient base for plants and algae. An excess of phosphates leads to the appearance of such algae as “black beard” and “antler”.
  • Ammonia / ammonium (NH4 / NH3). are absorbed by plants even faster than nitrates, but are poisonous to the inhabitants even in small concentrations. The only permissible concentration of these elements in aquarium water is 0 mg / l.
  • Nitrite (NO2) is an element produced by nitrifying bacteria. They convert ammonia / ammonium to nitrite, then nitrite to less hazardous nitrate. nitrite in the aquarium should be zero.
  • Iron, Potassium, Manganese, Zinc, Copper. may be present in water in small amounts. They have no effect in normal dosages on the inhabitants. Except for copper, which is harmful to ornamental shrimp!


Many aquarists solve the problem of water treatment by using a reverse osmosis unit. This is a special filter that passes tap water through itself and practically distilled water is obtained at the exit. Chlorine, all salts, heavy metals, almost everything are removed.


  • deep water purification;
  • the ability to create parameters “for yourself”;
  • water is always in the house, there is no need to go anywhere and buy;
  • the use of osmosis not only for aquaculture, but also in everyday life, for preparing food and drinks.
  • .
  • The need to change the membrane every three to four months, which costs about 800-1000 rubles.
  • The need for mineralization.
  • Budget systems have low productivity, from 8 l / h, so the process of recruiting osmosis can be quite long. As a way out. installing a special storage tank.


It is not recommended to use water from springs, natural wells and other natural sources.

It has many disadvantages:

  • usually high hardness salts;
  • unknown chemical composition;
  • instability of parameters (in winter and summer, the parameters of natural sources differ markedly).

Although it is worth noting that some amateurs manage to use spring water quite successfully, this is rather an exception, since in most cases everything does not end so rosy.

You can learn about spring water in an aquarium from this article.


About 80% of aquarists have regular tap water in their aquariums. But the result is different for everyone.

The fact is that in each region tap water has its own indicators, for example, in the Rostov region. water is very hard (KH10⁰), in the Moscow region. of medium hardness (4-8⁰), and in Leningrad region. very soft (KN Distilled

In fact, it is the best option. This is completely “naked” water, in which nothing is dissolved. In this form, it cannot be poured into the aquarium, of course, but this makes it possible to achieve its optimal parameters artificially with the help of special mineralizers.

Pros of using distillate in an aquarium:

  • topping up or replacing distilled water is a great opportunity to lower the hardness in the aquarium;
  • for demanding fish, plants and shrimp. this is one of the few ways to create favorable conditions for them;
  • the ability to “play” with the composition of the water as it will be convenient.
  • Salts for mineralization are not easy to find on sale, especially in small towns, and they are quite expensive.
  • Cost. With a large volume of aquarium economy, distilled water changes will cost an amateur a tidy sum.
  • Dependence. For inhabitants accustomed to soft, slightly acidic and clean water, a change with another water can cause death.

Read more about distilled water in an aquarium in this article.

Regular substitutions

The aquarist must change a certain amount of water in the aquarium weekly.

It is important that the water that is poured into the aquarium has the same parameters as the aquarium, otherwise, after the change, the inhabitants may experience stress, and especially gentle ones may even die.

The percentage of water change depends on the type of aquarium, but on average, it is 25-30% of the volume weekly. Before the change, it is also necessary to allow the water to warm up to at least room temperature.

If water of poor quality was poured into the aquarium. too hard or with impurities, then it is worth increasing the volume and / or frequency of changes and using osmosis or bottled water, or distillate as a replacement. But this should not be done abruptly and not uncontrollably, each substitution should be accompanied by a check of the necessary parameters.

If the fish survived such changes in the environment normally, then you can continue, if it was uncomfortable (poor appetite, apathy, asphyxia, redness on the gills). reduce the frequency and volume of changes. You should not lower the KH by more than 2⁰ during one change. For delicate fish and shrimp. no more than 1⁰.

Another important nuance is topping up water instead of evaporated. This is a very topical problem, especially in open type aquariums (no lid).

How best to pour into the aquarium?

When starting the aquarium, it is advisable to fill in the water that will be used in the future, either it is a water supply system, or mineralized osmosis / distillate, or bottled water.

Is it possible to fill?

It is possible, but it should only be understood that the distillate is dead water, therefore, it should not be poured into the aquarium naked.

It completely lacks hardness salts, which are necessary for both fish and plants, at least in minimal quantities.

Such water cannot be used without special water treatment. But if we consider artificially recovered distilled water, then this is almost the best option, since you can create any parameters that are required for certain purposes.

Distillate is also practically irreplaceable when breeding demanding fish species.

How to prepare for adding?

Before pouring distilled water into the aquarium, you must pay special attention to the water treatment.

Make sure that the purchased water is really distilled, this can be done using a TDS meter or tests for total and carbonate hardness.

If there are demanding types of shrimp (caridines) in the aquarium, then it is worth using an air conditioner that binds all heavy metals in order to get rid of copper ions.

Use a mineralizer suitable for the type of aquarium:

Aquarium type Required salts
Nautical Special synthetic sea salt
Herbalist GН or KH / GH
Cichlidnik KN / GH
Shrimp Gh
Sulawesi Shrimp and Snail Aquarium pH

Let the mineralizers dissolve for several hours, check the parameters, and if they are suitable, you can pour water into the aquarium.

Enhanced aeration in a container with distilled water and a mineralizer accelerates the dissolution of salts.

Is distilled water suitable for an aquarium, how to top it up correctly?

The quality of tap water in many regions of Russia leaves much to be desired, so sometimes aquarists are forced to look for alternative methods.

One of the most common is the use of distilled water in an aquarium. This is the purest water that contains absolutely no impurities, but is it really suitable for an aquarium??

Distillate advantages and disadvantages

Using distilled water in an aquarium has both advantages and disadvantages. The main disadvantage is the cost of such water, and if the aquarist does not feel this in small tanks, then for large volumes it is quite large regular costs.

Benefits of using distillate:

  • Maximum degree of cleaning. No unnecessary impurities.
  • The ability to artificially create any parameters.
  • The distillate maintains the stability of the parameters when topping up.
  • In many cases, the distillate has a slightly acidic reaction, which is great for most types of fish and aquarium plants.
  • Not every water sold under the guise of distilled water is. A real distillate should have a TDS = 0, but sometimes you can find “supposedly distilled water” with a TDS of more than 30 on sale. This is ordinary osmosis, though of low quality.
  • Cost. This is the most expensive water you can find. It is also possible to produce it yourself, but the gas or electricity bills will be impressive.
  • The need for artificial mineralization. over, household mineralizers are not suitable, special ones are needed for an aquarium, which also cost a lot of money.
  • Often copper equipment is used in the production of distillate, therefore, copper ions are often present in distilled water, which poison the arthropod inhabitants (shrimps) of the aquaruim. Therefore, it becomes necessary to use special conditioners.

Partial and complete replacement. does this affect the ability to use?

When changing, when starting up the aquarium, it is necessary to use only the recovered distillate. But in both cases, the use of a distillate with a set of necessary salts is an excellent opportunity to create an optimal environment for its inhabitants in the aquarium.

This allows you to keep the water parameters stable, because pure H2O evaporates, and the salts remain, while the distillate dilutes everything to the optimal level.

What is the best water to use?

No matter how good distilled water is, but its regular use will significantly hit the budget. Therefore, you should pay attention to more budgetary water, which has similar properties. It is either osmotic water or bottled.

Bottled water is good because many unscrupulous manufacturers sell the same osmotic water, but this is only in the hands of aquarists. The main thing is to find such water.

You will find a lot of useful and important information about what kind of water should be poured into the aquarium and how to do it correctly in this section.

How to add?

The recovered distillate should be added weekly with regular changes.

% of the water change depends on the type of aquarium, but most aquarists change about a third of the volume of the tank once a week.

This helps to remove accumulated organic debris and reduce algae-promoting nitrate and phosphate levels.

You can pour water directly from the container, the main thing is that the parameters of the distillate and the water parameters in the aquarium are approximately the same, so that the fish are not stressed.

In the hot season, add pure (not recovered) distillate more often, since the evaporation process occurs much faster than in winter or late autumn.